Fixed a typo
Fixed a typo

Summary: Pull Request resolved: https://github.com/facebook/watchman/pull/622

Differential Revision: D8772446

Pulled By: wez

fbshipit-source-id: 2a19a528b8eca1e5162a33befac2bebcdf92bf35

wez/watchman,nodakai/watchman,facebook/watchman,nodakai/watchman,facebook/watchman,wez/watchman,nodakai/watchman,wez/watchman,facebook/watchman,facebook/watchman,nodakai/watchman,facebook/watchman,wez/watchman,nodakai/watchman,wez/watchman,wez/watchman,nodakai/watchman,nodakai/watchman,wez/watchman,facebook/watchman,nodakai/watchman,wez/watchman,facebook/watchman,facebook/watchman,nodakai/watchman,wez/watchman,facebook/watchman